CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Income and Comprehensive Income
Net Income	$ 91,324	$ 92,945
Other comprehensive income (loss) before tax:
Reclassification to retained earnings due to cumulative effect adjustment	(605)	0
Foreing currency translation adjustment	93	139
Amortization of net losses	5,386	5,607
Amortization of prior service credit	(867)	(950)
Unrealized holding losses on debt securities arising during the period	(121,189)	(3,026)
Unrealized holding gains on equity securities arising during the period	0	119
Reclassification adjustment for (gains) losses on securities included in net income (loss)	0	(162)
Unrealized net (losses) gains on cash flow hedges	1,225	(637)
Reclassification adjustment for net (gains) losses included in net income	(1,267)	855
Other comprehensive income (loss) before tax	(117,224)	1,945
Income tax benefit (expense)	5,038	(1,571)
Total other comprehensive loss, net of tax	(112,186)	374
Comprehensive income (loss), net of tax	$ (20,862)	$ 93,319